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• Acer Aspire 7739G-6647 won't connect to the internet

  - by Nux

  Acer Aspire 7739G-6647, it belongs to a family member. I reinstalled the chipset, LAN drivers, ethernet controllers, etc. I'm positive it's not my router or modem or anything like that. I have other laptops running on the network, this one just has some strange issue. For some reason, it's saying "Work Offline" is enabled when I open Windows Media Player, and the PC seems to be connected to the network, but on the graphic in networking, it doesn't show the connection between the network and the internet. Could anyone try to state any possible reason for this issue? Any help is appreciated.

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• Event ID 8021 The browser was unable to retrieve a list of servers from the browser master

  - by Ash

  We have a LAN where workstations are randomly losing network connectivity for brief moments of time. The workstations can also take a long time to login to the domain. During our troubleshooting we have found an error log on a few Windows 7 workstations: Warning BROWSER 8021 The browser was unable to retrieve a list of servers from the browser master \\random-pc on the network \Device\NetBT_Tcpip_{BBABCDE9-D8A0-4399-93F2-492FE0848B12}. The data is the error code. What do these errors mean? What computers should have the Computer Browser service enabled, workstations and/or servers? The environment is a mix of Windows 7 & Windows XP workstations on a Windows Server SBS 2011 SP1 domain.

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• How can I install CentOS without a keyboard, mouse, or monitor?

  - by user1032531

  I will be buying a new computer which will be used as a CentOS server. I will put it on my home LAN, and once it is set up, will access it only through SSH. I don't want to spend a lot of money (maybe $500), and I don't want to buy another monitor or keyboard just to through them away after the server is setup. My question is how do I access the computer without a keyboard and monitor when I install the operating system? For media, I can use either the DVD or an ISO on the USB, so am good there. But how do I see what I am doing and enter commands without a monitor or keyboard? I have a Window 7 laptop, an XP laptop, and a CentOS laptop. Can I use one of my laptops to act as the MMI (Man Machine Interface)? If not, what is the easiest and least expensive option? Thank you

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• Macports Apache Slow to Start/Stop

  - by moranjk

  I am running OSX 10.8.5 (Mountain Lion) with Apache2 from MacPorts for local development, and just recently I noticed it is taking almost a minute to restart Apache. I wouldn't think anything of it except it normally would restart in less than a second. I had all but given up Googling when I noticed that if I turned off the WiFi (I haven't tried hardwire yet) Apache would restart just as it use to. What would cause Apache to take longer to start when I am connected to the LAN? What can be done to mitigate this issue?

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• Which mediacenter appliance

  - by Guillaume

  I'm looking to buy a mediacenter appliance, but I am a bit lost by all the offers on the market. Here are the features I am looking for : at least 500Go HDD capable of playing HD (1080p) supporting a good range of video and audio codecs support for subtitles including a DVB-T input (coax) and tuner composite video input 5.1 (or 7.1) analog audio output LAN (100M or Gigabit) fileserver (SMB or NFS) remote control possibly digital output (S/PDIF, TOSLINK, or other) no need for integrated DVD player no need for wifi The Ultio Pro looks nice (http://www.thinkgeek.com/electronics/home-entertainment/d3fe). It just lacks a DVB-T input which is a show killer for me. Thanks for your suggestions.

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• Accessing A Shared Directory That Has An Account White List

  - by Xan

  I'm on a LAN here at work and I have my desktop sharing some of my project folders. I can access the computer via \\ComputerIP\, but I can't actually open any of the folders. Upon attempting, I get the error: Windowns cannot access \ComputerIP\ProjectFolder You do not have permission to access \ComputerIP\ProjectFolder. Contact your network administrator to request access. For more information about permissions, see Windows Help and Support Now, this is understood considering I've made it so that you had to utilize the "Project" credentials to connect. I have a user account on my main computer hosting these shared folders that gives full access to the folders if you are this "Project" user. I can Remote Desktop the computer just fine from my laptop using either set of credentials. When I try to open these folders it doesn't give me the option to attempt to apply any credentials like it does when I remote desktop. How am I supposed to gain access to these folders?

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• How to make a pxe bootable 10MegaByte or larger dos image?

  - by rjt

  Would like to make a "massive" DOS floppy disk image, say 10MegaBytes or more containing all the firmware updates i need for any system, harddrive, BIOS. i do not need the DOS image to be networkable as everything will be on the PXE booted image, but networking would be nice. Since ZipDisks were attached to the floppy disk controller and were over 100MegaBytes, this should be possible. i tried a long time ago to do this and spent too much time on it only to have it fail to boot. So if someone has reliable instructions on how to create such a nightmarish beast and edit it, please let me know. One image that can used for PXE and copied to a USB stick would be a plus. Too bad manufacturers don't supply a single bootable Linux ISO containing all their firmware updates, that would be easy to boot over-the-lan and have networking. HP servers do this and it is awesome.

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• How to prevent Outlook from receiving multiple copies of the same email

  - by martani_net

  This question might be asked already, but it's different from this one. My boss has Outlook 2003, when he synchronize his emails while connecting through the local server (using Exchange I guess) he gets his emails normally. Once he is outside (not connection to our LAN) he gets each email duplicated 3 or 4 times. Does anyone experienced this before? and how can we fix this? Please no links to FAQ pages. For info, we are using Kaspersky anti virus and Windows 2003 server, with windows XP clients. [Update] Actually we have a bunch of 5 or 6 email accounts on Outlook, and only one of them recieve duplicated copies of the same email, all the others are cool. Further more all these email are using the sae service, Gmail for example. [Update 2] I just found out that Outlook is configured to remove emails from the server already, also, some emails exceeds 5 copies! Thank you

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• IPv6 static routes

  - by user98651

  I am looking to configure a few hosts with IPv6 on my network. The router (running CentOS 5) is configured with an Hurricane Electric (HE) tunnel which works fine on that host. However, I would like to statically add a few additional hosts on the same LAN to have IPv6 through this tunnel. No, I don't want radvd or dhcpv6 to do the work for me in this case. I already have IPv6 forwarding enabled in sysctl.conf. I am looking for help with the next steps (statically adding the routes). Lets say the IP addresses are as follows: Router: 2001:470:1b07:1:: Host1: 2001:470:1b07:2:: How would I go about making them see each other? Thanks in advance for the help.

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• Cyrus: How Do I Configure saslauthd For Authentication?

  - by Nick

  I'm trying to get Cyrus IMAP (v 2.2 on Ubuntu 9.04) setup and working, but I'm having a bit of trouble getting the login working correctly. I've created a mailbox for my test user "nrahl": cm user/nrahl and then created a password: $ saslpasswd2 nrahl I'm attempting to connect to the mailbox using Thunderbird. I'm using the machine's LAN IP address as the host, and "nrahl" as the username. It connects to the server and prompts me for the password. When I enter it, I get "Login to server failed." in Thunderbird, and /var/log/mail.log shows: Apr 15 19:20:01 IMAP cyrus/imap[1930]: accepted connection Apr 15 19:20:09 IMAP cyrus/imap[1930]: badlogin: [192.168.5.21] plaintext nrahl SASL(-13): authentication failure: checkpass failed Part of /etc/imapd.conf with comments removed: sieveusehomedir: false sievedir: /var/spool/sieve #mailnotifier: zephyr #sievenotifier: zephyr #dracinterval: 0 #drachost: localhost hashimapspool: true allowplaintext: yes sasl_mech_list: PLAIN #allowapop: no #sasl_maximum_layer: 256 #loginrealms: example.com #virtdomains: userid #defaultdomain: sasl_pwcheck_method: saslauthd #sasl_auxprop_plugin: sasldb sasl_auto_transition: no UPDATE: When setting: sasl_pwcheck_method: alwaystrue in /etc/imapd.conf, login works correctly. So I'm assuming the issue is saslauthd related.

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• Remote connection IP to use

  - by petwho

  I have two laptops that both run on ubuntu and installed ssh server and ssh client on them. One is usually on my desk at home and one I usually bring to my company. When I'm at home I can easily ssh to one from the other by typing this command (to login to the other laptop whose IP address is: 192.168.0.105) : ssh -p 22 [email protected] However, When I'm at my company, I try to type the same command and ofcourse it doesn't work. I understand that when at home I'm on LAN network, that my laptops actually using my ISP's address which differ from 192.168.0.107 asummed 203.113.131.1. So could you tell me what IP that ssh shoud use for my laptop (at work) to connet to my computer at home? Thank you.

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• Proxification rulte for System process

  - by kseen

  I'm trying to configure Microsoft Visual Studio 2010 remote debugging and ran into issue: while connecting to remote computer running MSVSMON, client computer sends SYN request for connection. It makes it under the System process (as I see it in TCPView). As every network apps should be configured to use proxy in our network, I'm trying to add devenv.exe to proxification rules to make its traffic goes thru LAN's proxy server. It doesn't help. So my question is how can I make that low-level-system traffic will go through local area network proxy server?

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• How can I prevent my domain controller doing forward lookups for remote users?

  - by markmnl

  I have a Windows Server 2003 server in the office. I VPN into the LAN remotely. My VPN has a virtual NIC with the Windows Server as the primary DNS since it is a domain controller. When connected to the VPN and I do an nslookup or simply browse the web the DNS from the VPN provides the DNS answers. I believe this is because it has DNS forwarders, so queries it can't answer are forwarded and then it relays the answer. This is the desired behavior for workstations in the office (they should query their domain controller first); however for remote VPN users this is not desirable. I do not want my remote office's server to answer DNS queries it is not the authority of (which happens to be 192.168.x.x). Is there any way I can configure this?

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• Setting up multiple wireless access points on same network

  - by SqlRyan

  I'd like to add wireless to my network, and I need multiple access points to cover the whole area. I'd like to set them up so that there's only one "wireless network" that the clients see, and it switches them as seamlessly as possible between access points as they wander around (if that's not possible, then at least have it so that they don't need to set up the security by hand on each one the first time, if possible). I've searched online, and there are quite a few sets of mixed instructions (same vs different SSID, frequency, does the security need to match exactly, etc.). Can somebody who has some experience doing this please let me know what they did? I imagine it's pretty simple, but there seems to be no clear cut "yes, you can do this" online, even though I know you can. I have a mid-size LAN with about 20 workstations and two Domain Controllers on it. Also, I'll be doing this with consumer wireless components, if it makes a difference, not enterprise-level components (ie. Linksys rather than Cisco).

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• Upgrading my home network to Gigabit Ethernet and Wireless-N turns out slower than before

  - by Raheel Khan

  My home network has three desktops, three laptops and some NAS drives. All desktops and NAS drives support Gigabit LAN and all laptops support Wireless-N. I was running a 100 BaseT switch though. I recently purchased a Gigabit Ethernet Switch and an Wireless-N ADSL Modem-Router. After upgrading, I noticed that the wireless file transfer speeds from laptop-to-NAS and vice versa became terribly slow. Possibly even slower than before the upgrade. The transfer speeds from desktop-to-NAS (wired) have improved though. As an example, copying a 50GB file from laptop-to-NAS was estimated at 15 hours! Is there something I can do to improve this? Also, should I consider buying a dedicated wireless access point for speed rather than using the Wireless modem-router?

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• ADSL connetion (BSNL dataone) with puppy Linux

  - by Vaibhav Garg

  I have an old PC which I want to use for internet browsing. I tried using Puppy Linux (version 4.3.1) for the same but have not been able to connect. I connect via PPPoE. My network card is RTL 8029b which is automatically detected by Puppy Linux. However, the LED indicator on the MODEM designating LAN connectivity stays off. This post is being typed from the same PC running XP, so there are no connection issues. I am a complete newbie for Linux. can somebody point me to instructions. I will be willing to give any more information if required. P.S. My MODEM is Huewei Smartax MT 882 Thanks

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• How to disable Tcp/Ip settings in windows 7 via GPO?

  - by Akash Kava

  I have enabled following policies, "Prohibit TCP/IP advanced connection" "Prohibit access to properties of components of a LAN connection" "Enable Windows 2000 Network Connections setings for Administrators" after doing all these, all machines running windows xp, 2000 and vista have network settings properties button disabled as expected. However all machines running windows 7 have no effect, I believe there are few more steps, all Windows 7 machines are on domain and we want to control this via Domain Controler's GPO. Please let me know, what I need to do to have Windows 7 disable the properties of network connection, I am not network expert, I read few articles about what new has been added in GPO of windows 7 but I am blank. Everything works fine on Windows XP, Vista, 2003 Server. Only Windows 7 is a problem.

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• VirtualBox networking problem, host XP, guest Debian

  - by Silma

  Hi, I'm trying to set up a development environment in a virtual machine on my laptop, with debian os. I have both lan and wlan available on the host machine, yet I can't connect to the internet using either. As I said the host OS is windows XP and the guest OS will be the latest Debian, we downloaded the business card net install so we need internet access from the beginning, besides we need the virtual machine to be visible on the local network (for my fellow developers). We tried host-only networking, NAT, bridging, with proxy (the local network uses a proxy to connect to the internet) and without proxy, nothing seems to work. What else can we do? Thanks a lot.

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• Using GlusterFS for simple replication

  - by k7k0

  Hi, newbie question. I need to build this: /shared folder ~500GB of files, ~1MB each one. Two boxes (server1 and server2) connected by a 1Gbs LAN Every box needs to get r/w access to the files, so their are both clients I want that the files replicated on both boxes, every time a file is written in one server the same file should be present in the other one. My questions regarding GlusterFS: It'll duplicate the files on the same box?. For example the files are on /shared and the mount in /mnt/shared. It'll take 1GB space on every server? Instead, should I use the filesystem directly, locally writing on /shared? Does the replication work in this way without mountin a client? Also, if anyone know any other way to acomplish this setup I'll be very grateful. Thanks in advance.

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• Bridging VirtualBox over OpenVPN TAC adapter on Windows

  - by Sean Edwards

  I'm trying to configure a virtual machine (VirtualBox guest running Backtrack 4) with a bridged adapter over a VPN connection. The VPN is is hosted by the cybersecurity club at my university, and connects to a sandboxed LAN designed for penetration testing against various servers that the club has built. My host (Windows 7 Ultimate) connects to the VPN fine and is assigned an IP through DHCP, but for some reason the VM can't do the same thing, and I'm not sure why. It's like OpenVPN is filtering out packets from the MAC address it doesn't recognize. I want the virtual machine to bridge over the VPN connection, because our IT office has very strict policies about what you can and can't do on the network. I want to be able to run active attacks (ARP spoofing, nmap, Nessus scans) in the sandbox environment without risking the traffic accidentally going over the university network and getting my internet access revoked. Bridging over the VPN connection and running all attacks from inside the VM would solve that problem. Any idea why the host can use this interface, but the VM can't?

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• Secure external connection to SQL Server (from third party software)

  - by Bart

  I have a SQL Express 2008 R2 server running on a server in an internal lan network. A few databases are used by some third party software to store data. A SQL-Server user is used by this application to connect to the database. Now I need to access this database using a local installation of the software from an external pc. In this particular case a VPN connection is not the solution I am looking for. I have access to an external linux server, so I tried ssh tunneling from the windows server to the linux server and use the external pc to tunnel it back from the linux server to the client, but this is working very very slow. What are my other options to allow this external connection in a safe way?

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• Cyrus: How Do I Configure saslauthd For Authentication?

  - by Nick

  I'm trying to get Cyrus IMAP (v 2.2 on Ubuntu 9.04) setup and working, but I'm having a bit of trouble getting the login working correctly. I've created a mailbox for my test user "nrahl": cm user/nrahl and then created a password: $ saslpasswd2 nrahl I'm attempting to connect to the mailbox using Thunderbird. I'm using the machine's LAN IP address as the host, and "nrahl" as the username. It connects to the server and prompts me for the password. When I enter it, I get "Login to server failed." in Thunderbird, and /var/log/mail.log shows: Apr 15 19:20:01 IMAP cyrus/imap[1930]: accepted connection Apr 15 19:20:09 IMAP cyrus/imap[1930]: badlogin: [192.168.5.21] plaintext nrahl SASL(-13): authentication failure: checkpass failed Part of /etc/imapd.conf with comments removed: sieveusehomedir: false sievedir: /var/spool/sieve #mailnotifier: zephyr #sievenotifier: zephyr #dracinterval: 0 #drachost: localhost hashimapspool: true allowplaintext: yes sasl_mech_list: PLAIN #allowapop: no #sasl_maximum_layer: 256 #loginrealms: example.com #virtdomains: userid #defaultdomain: sasl_pwcheck_method: saslauthd #sasl_auxprop_plugin: sasldb sasl_auto_transition: no UPDATE: When setting: sasl_pwcheck_method: alwaystrue in /etc/imapd.conf, login works correctly. So I'm assuming the issue is saslauthd related.

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• On a router, how do I block wan access for a particular machine without blocking its access to the local network?

  - by HappyEngineer

  On my tp-link TL-WR1043ND router I want to prevent a particular machine from having access to the WAN while still allowing that machine to access other machines on the LAN. My assumption is that I need to do something in the "Access Control" section, however the problem is that it wants an ip range or domain name for the target of the rule. The router uses DHCP to get an address from the WAN, so I don't have any guarantee what the ip address of the wan will be. If the answer is that it's not possible with this router, could someone describe how to do it using OpenWRT instead?

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• Setting up nginx on Ubuntu?

  - by Industrial

  Hi everyone, I've just setup a VPS running Ubuntu server 10.10 as a test environment to run with nginx. This far i've ran apt-get install nginx php5 php5-cgi and accessed the IP of the VPS with a browser which outputs It works, so it should be ready to run. Never having worked with nginx in the past, I have no idea on what to do next. How should I config my nginx install to run properly as a staging server in my LAN? Apparently, there's multiple configs for nginx including sites-default and nginx-default making me really confused.

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• Internet not working on a VirtualBox Linux machine

  - by mtahmed

  I installed VirtualBox on a Windows 7 PC and installed Xubuntu (Ubuntu with XFCE) on it. Now on the Windows, I am connected to the internet through a LAN which automatically authenticates to connect to the network(because its my work computer). I have also installed the guest additions on this virtual machine (Xubuntu). I tried both NAT and bridging to set up internet connection but I still cannot connect to the internet. For NAT: The browser doesn't say website not found but it keeps trying to load it forever and the network status monitor (the one provided by VirtualBox) doesn't show any green light (no incoming packets). For Bridging: Same as for NAT but the network status monitor shows incoming packets and outgoing packets. But internet still doesn't work. I tried a lot of different things but none worked.

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